The IPHAS Catalogue of Halpha Emission Line Sources in the Northern Galactic Plane

Abstract

We present a catalogue of point-source Halpha emission line objects selected from the INT/WFC Photometric H$\alpha$ Survey of the Northern Galactic Plane (IPHAS). The catalogue covers the magnitude range 13 < r' < 19.5 and includes northern hemisphere sources in the Galactic latitude range -5 < b < 5 degress. It is derived from ~1500 square degress worth of imaging data, which represents 80 percent of the final IPHAS survey area. The electronic version of the catalogue will be updated once the full survey data becomes available. In total, the present catalogue contains 4853 point sources that exhibit strong photometric evidence for Halpha emission. We have so far analyzed spectra for ~300 of these sources, confirming more than 95 percent of them as genuine emission-line stars. A wide range of stellar populations are represented in the catalogue, including early-type emission line stars, active late-type stars, interacting binaries, young stellar objects and compact nebulae. The spatial distribution of catalogue objects shows overdensities near sites of recent or current star formation, as well as possible evidence for the warp of the Galactic plane. Photometrically, the incidence of Halpha emission is bimodally distributed in r'-i'. The blue peak is made up mostly of early-type emission line stars, whereas the red peak may signal an increasing contribution from other objects, such as young/active low-mass stars. We have cross-matched our Halpha-excess catalogue against the emission-line star catalogue of Kohoutek & Wehmeyer, as well as against sources in SIMBAD. We find that fewer than 10 per cent of our sources can be matched to known objects of any type. Thus IPHAS is uncovering an order of magnitude more faint (r' > 13) emission line objects than were previously known in the Milky Way.

arXiv comment13 pages, 10 figures, accepted for publication in MNRAS. The paper itself contains only an abridged version of the catalogue; the full catalogue is available from http://www.astro.soton.ac.uk/~christian/ (under the IPHAS link). The emitter catalogue will also be made available via CDS and alongside the IPHAS Initidal Data Release (http://idr.iphas.org)

References in corpus (6)

• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• A Robotic Wide-Angle H-Alpha Survey of the Southern Sky
• The Wisconsin H-Alpha Mapper Northern Sky Survey
• The Aao/Ukst Supercosmos H-alpha Survey (SHS)
• Newly Discovered Cataclysmic Variables from the INT/WFC Photometric H alpha Survey of the Northern Galactic Plane
• The Properties of Cataclysmic Variables In Photometric Halpha Surveys

Cited by in corpus (65)

• The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue
• The Second Data Release of the INT Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS DR2)
• LAMOST Spectroscopic Survey of the Galactic Anti-centre (LSS-GAC): target selection and the first release of value-added catalogues
• Stellar Locus Regression: Accurate Color Calibration, and the Real-time Determination of Galaxy Cluster Photometric Redshifts
• T Tauri candidates and accretion rates using IPHAS: method and application to IC1396
• Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS)
• A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
• High Spatial Resolution Galactic 3D Extinction Mapping with IPHAS
• Candidate planetary nebulae in the IPHAS photometric catalogue
• The North American and Pelican Nebulae II. MIPS Observations and Analysis
• Hot stars observed by XMM-Newton II. A survey of Oe and Be stars
• Tails and streams around the Galactic globular clusters NGC1851, NGC1904, NGC2298 and NGC2808
• The Formation of a Stellar Association in the NGC 7000/IC 5070 Complex: Results from Kinematic Analysis of Stars and Gas
• IGAPS: the merged IPHAS and UVEX optical surveys of theNorthern Galactic Plane
• Triggered star formation and Young Stellar Population in Bright-Rimmed Cloud SFO 38
• Extreme infrared variables from UKIDSS - II. an end-of-survey catalogue of eruptive YSOs and unusual stars
• New Young Planetary Nebulae in IPHAS
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IX: The Ninth Year (2016-2017)
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VIII: The Eighth Year (2015-2016)
• Extreme Infrared Variables from UKIDSS - I. A Concentration in Star Forming Regions
• Hibernating black holes revealed by photometric mass functions
• Pre-main sequence stars older than 8 Myr in the Eagle Nebula
• Compact planetary nebulae: Improved IR diagnostic criteria based on classification tree modelling
• Towards a census of the Galactic anticentre star clusters: colour-magnitude diagram and structural analyses of a sample of 50 objects
• A deep catalogue of classical Be stars in the direction of the Perseus Arm: spectral types and interstellar reddenings
• Physical parameters of IPHAS-selected classical Be stars. (I. Determination procedure and evaluation of the results.)
• Identification of new classical Be stars from the LAMOST MRS survey
• The Ionized Nebula surrounding the Red Supergiant W26 in Westerlund 1
• Follow-up Studies of Five Cataclysmic Variable Candidates Discovered by LAMOST
• Extremely red stellar objects revealed by IPHAS
• Spectroscopic identifications of blue H-alpha excess sources in the Kepler field-of-view
• Towards a census of the Galactic anticentre star clusters II: exploring lower overdensities
• Investigating the X-ray counterparts to unidentified sources in the 1000-orbit INTEGRAL/IBIS catalogue
• First results of an H-alpha based search of classical Be stars in the Perseus Arm and beyond
• A Naive Bayes Classifier for identifying Class II YSOs
• An Halpha-selected sample of cataclysmic variables -- II. Implications for CV evolution
• A catalogue of early-type emission-line stars and Hα line profiles from LAMOST DR2
• Discovery of 2716 hot emission-line stars from LAMOST DR5
• A first catalogue of automatically selected UV-excess sources from the UVEX survey
• Discovery of a new classical nova shell around a nova-like cataclysmic variable
• Spectroscopic follow-up of UV-excess objects selected from the UVEX survey
• The star formation environment of the FU Ori type star V582 Aur
• X-ray survey of the North-America and Pelican star-forming complex (NGC7000/IC5070)
• An IPHAS-based search for accreting very low-mass objects using VO tools
• The GALAH survey: Characterization of emission-line stars with spectral modelling using autoencoders
• The IPHAS-POSS-I proper motion survey of the Galactic Plane
• A FEROS spectroscopic study of the extreme O supergiant He 3-759
• J-PLUS: Tools to identify compact planetary nebulae in the Javalambre and southern photometric local universe surveys
• Spectroscopic Studies of 30 Short-period Cataclysmic Variable Stars, and Remarks on the Evolution and Population of Similar Objects
• Photometric determination of the mass accretion rates of pre-main sequence stars. VII. The low-density cluster NGC 376 in the Small Magellanic Cloud
• The Gaia/IPHAS and Gaia/KIS Value-Added Catalogues
• Population-based identification of Hα-excess sources in the Gaia DR2 and IPHAS catalogues
• UV-excess sources with a red/IR-counterpart: low-mass companions, debris disks and QSO selection
• Emission line star catalogues post-Gaia DR3: A validation of Gaia DR3 data using LAMOST OBA emission catalogue
• The young star population of L1188
• Candidate Hα emission and absorption line sources in the Galactic Bulge Survey
• Mapping H$\alpha$-Excess Candidate Point Sources in the Southern Hemisphere Using S-PLUS Data
• A revised view of the Canis Major stellar overdensity with DECam and Gaia: new evidence of a stellar warp of blue stars
• Virtual Observatory based identification of AX J194939+2631 as a new cataclysmic variable
• Extended Ionized Fe Objects in the UWIFE Survey
• Young Stellar Object Candidates in IC 417
• Spectroscopic follow-up of a sub-set of the Gaia/IPHAS catalogue of Hα-excess sources
• MIRIS Paα Galactic Plane Survey. II. The Catalog of Paα Emission-line Sources
• BCD spectrophotometry for massive stars in transition phases
• Galactic Plane H$\alpha$ Surveys: IPHAS & VPHAS+